Question

The potential difference between the fixed part and freely mobile portion of the solution side of double layer in soil colloids is known as

• A. Total Water Potential
• B. Theta Potential
• C. Gravitational Potential
• D. Zeta Potential

Hint:

Zeta potential:
- Electrokinetic potential in soil colloids.
- Determines dispersion/flocculation.
- Higher zeta potential = stable suspension.

Answer 1

The Correct Option is D

Step 1: Understanding the Question:
This question tests knowledge of electrokinetic phenomena in soil colloids.

Step 2: Detailed Explanation:
The Zeta Potential (D) is the potential difference between the fixed part and the freely mobile portion of the solution side of the double layer in soil colloids.
It is also called the electrokinetic potential.
Zeta potential determines the stability of colloidal suspensions.
A higher zeta potential indicates greater repulsion between particles (dispersion), while a lower zeta potential leads to flocculation.
Other options:
- Total Water Potential (A): Not related to the double layer.
- Theta Potential (B): Not a standard term.
- Gravitational Potential (C): Not related to the double layer.
Thus, Zeta Potential is the correct term.

Step 3: Final Answer:
Thus, the potential difference is known as Zeta Potential, which corresponds to option (D).
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